condition mean min max 4 h after light 1648.2 1648.2 1648.2 8 h after light 1711.75 1548.4 1875.1 12 h after light 1643.55 1583.3 1703.8 4 h after dark 1889.95 1499.4 2280.5 8 h after dark 1822.9 1467.5 2178.3 12 h after dark 1701.95 1606.7 1797.2